Non-right-angled triangle

Key term for Edexcel GCSE Mathematics, used in Mensuration and Calculation.

Definition

A triangle (such as scalene or isosceles) that does not contain a 90° angle.

Exam Context

Non-right-angled triangle appears in Edexcel GCSE Mathematics revision content for Geometry and Measures, especially Mensuration and Calculation and Area of a Triangle.

Geometry and Measures Mensuration and Calculation Area of a Triangle

Found in Revision Notes

Geometry and Measures

Area of a Triangle

Mensuration and Calculation • Area of a Triangle

Revise note

Related Key Terms

Included angle Inverse sine (sin⁻¹)SAS Sine rule for area

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Sine (sin)